Born in Pittsburgh, Pennsylvania, USA, he received an Excellence in Production Design Award nomination from the Art Directors Guild in 1999 in the category Television Series for his work on Seven Days.

Early credits include as assistant art director for ILM on the drama Backdraft (1991), as designer on the television special A Walton Thanksgiving Reunion (1993), as art director on the television series Life Goes On, the drama Prefontaine (1997) and on the comedy Dead Man on Campus (1998), as production designer on the short film Toxic Remedy (1997), and as assistant art director on the fantasy comedy Dogma (1999).

Weimerskirch worked in the art department of the science fiction films Star Wars: Episode II – Attack of the Clones (2002) and Star Wars: Episode III – Revenge of the Sith (2005). Further credits as art director include the comedy sequel American Wedding (2003) and the talk show Ellen: The Ellen DeGeneres Show (2003). He also worked as assistant art director on the war drama Flags of Our Fathers (2006) and as set designer on the action thriller Unstoppable (2010, starring Chris Pine).

More recently, Weimerskirch worked as assistant art director on the science fiction film I Am Number Four (2011, with art directors Gary Kosko and John B. Josselyn) and on the crime drama Contraband (2012, with art director Dennis Bradford) and as art director on the romance The Perks of Being a Wallflower (2012), the crime drama Jack Reacher (2012), and the drama Promised Land (2012).